Solgars gentle iron contains iron bisglycinate a well tolerated nonconstipating form of ironiron plays an important role in the production of hemoglobin with protein and copper and oxygenation of red blood cells and lymphocytes iron improves the function of enzymes in protein metabolism and enhances the functions of calcium and copper it is absorbed in the small intestine and stored in the liver spleen bone marrow and blood iron is needed to metabolize b vitamins